Shield Block + Trinket advice

[Frostglaive]

So after getting some nice key gear from the frost vendor, I decided to get the Corroded Skeleton Key What my idea was is to make a macro that activates this Trinket with Shield Wall. (I have the shield wall glyph, and the talents for it)

#showtooltip Shield Wall
/cast Shield Wall
/use 14

I see it being helpful since they are on the same cooldown, and it absorbs more damage. What do you guys think?

[krc]

I wouldn't use that as your only trinket cooldown since it can be very useful alone such as on inhale 2 on Festergut but that wouldn't be a bad idea for the Lich King since the trinket isn't really needed in a cooldown rotation but it would be better suited if you had the 4pc and combined it with Bloodrage since it would absorb around 18k of his Soul Reaper ability.